Customers, Sources: Regional warehouses: Demand centers Sinks plants Stocking points vendors Field warehouses: ports Stocking points Supply Inventory warehousing costs Production/ purchase Transportation Transportation costs costs Inventory costs warehousing costsSupply Sources: plants vendors ports Regional warehouses: Stocking points Field warehouses: Stocking points Customers, Demand centers Sinks Production/ purchase costs Inventory & warehousing costs Transportation costs Inventory & warehousing costs Transportation costs